27D, Belsize Square has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 19 Oct 2020.

The property is connected to mains gas and has some double glazing. It is heated using a boiler and radiators (mains gas).

The most recent sale of 27D, Belsize Square completed on 30th January 2026 at £862,500 and was recorded by HM Land Registry as a leasehold flat.

Since 1995 the property has sold 5 times.

Values of comparable properties have dropped by 8.3% over the period since January 2026.

• Sold Jan 2026£862,500
• Sold Jun 2012£815,000
• Sold Jun 2000£322,000

Since 2007 18 properties similar to 27D, Belsize Square have sold within a radius of 260 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 22nd July 2025, was Flat 8, Jade House 12, Lancaster Grove, London, NW3 4NX, a leasehold flat which sold for £700,000.

Read more about house prices in NW3.

• Sold Jul 2025£700,000 | 2 Bed FlatFlat 8, Jade House 12, Lancaster Grove, London, NW3 4NXFlat 8, Jade House 12, Lancaster Grove, London, NW3 4NX
• Sold Jun 2025£887,500 | 2 Bed Flat12B, Belsize Park Gardens, London, NW3 4LD12B, Belsize Park Gardens, London, NW3 4LD
• Sold Sep 2024£910,500 | 2 Bed FlatFlat 2, 47, Belsize Square, London, NW3 4HNFlat 2, 47, Belsize Square, London, NW3 4HN
• Sold Jun 2024£775,000 | 2 Bed FlatFlat 2, 51, Belsize Park Gardens, London, NW3 4JLFlat 2, 51, Belsize Park Gardens, London, NW3 4JL
• Sold May 2024£594,000 | 3 Bed Flat27C , Belsize Square, London, NW3 4HU27C , Belsize Square, London, NW3 4HU
• Sold Jul 2022£1,076,150 | 2 Bed FlatFlat 5, 6, Strathray Gardens, London, NW3 4NYFlat 5, 6, Strathray Gardens, London, NW3 4NY
• Sold Feb 2022£1,100,000 | 3 Bed FlatFlat 1, 3, Buckland Crescent, London, NW3 5DHFlat 1, 3, Buckland Crescent, London, NW3 5DH
• Sold Jun 2021£965,000 | 3 Bed FlatFlat 3, Jade House 12, Lancaster Grove, London, NW3 4NXFlat 3, Jade House 12, Lancaster Grove, London, NW3 4NX
• Sold Dec 2020£650,000 | 2 Bed FlatFlat E, 25, Lancaster Grove, London, NW3 4EXFlat E, 25, Lancaster Grove, London, NW3 4EX
• Sold Jun 2020£785,000 | 3 Bed Flat24C , Lambolle Road, London, NW3 4HP24C , Lambolle Road, London, NW3 4HP
• Sold Nov 2019£1,100,000 | 3 Bed FlatFlat C, 25, Lancaster Grove, London, NW3 4EXFlat C, 25, Lancaster Grove, London, NW3 4EX
• Sold Apr 2017£1,040,000 | 2 Bed FlatFlat 2, 26, Belsize Avenue, London, NW3 4AUFlat 2, 26, Belsize Avenue, London, NW3 4AU
• Sold May 2016£1,000,000 | 3 Bed FlatFlat 7, Jade House 12, Lancaster Grove, London, NW3 4NXFlat 7, Jade House 12, Lancaster Grove, London, NW3 4NX
• Sold May 2016£895,000 | 2 Bed Flat27A , Belsize Square, London, NW3 4HU27A , Belsize Square, London, NW3 4HU
• Sold Sep 2012£865,000 | 3 Bed FlatFlat D, 30, Belsize Square, London, NW3 4HUFlat D, 30, Belsize Square, London, NW3 4HU
• Sold Jan 2011£725,000 | 2 Bed Flat1A, Crossfield Road, London, NW3 4NS1A, Crossfield Road, London, NW3 4NS
• Sold Oct 2009£650,000 | 3 Bed FlatFlat 2, 12, Lancaster Drive, London, NW3 4HAFlat 2, 12, Lancaster Drive, London, NW3 4HA
• Sold Jun 2007£585,000 | 2 Bed FlatSecond Floor Flat, 57, Howitt Road, London, NW3 4LUSecond Floor Flat, 57, Howitt Road, London, NW3 4LU

Over the past 2 years our Estate Agent network has recorded 2 lets within 260 metres of 27D, Belsize Square.

The latest, in February 2025, was 3B , Lancaster Drive, London, NW3 4EY, a leasehold flat let by Fine Living.

• 
  Let agreed Feb 2025£ Undisclosed | 2 Bed Flat3B , Lancaster Drive, London, NW3 4EY3B , Lancaster Drive, London, NW3 4EY
• 
  Let agreed Mar 2024£ Undisclosed | 1 Bed Flat3A , Lancaster Drive, London, NW3 4EY3A , Lancaster Drive, London, NW3 4EY

•Nearby is defined as the radius comprising the nearest 2,000 addresses.

Of the 264 addresses on Belsize Square, London, NW3, 27D, Belsize Square comes out as the 104th largest and the 143rd most expensive in our analysis of the public data.

It is also £528k less expensive than the average property across the NW3 district.

• Holy Trinity CofE Primary School, NW3

  600 m away
• Rosary Catholic Primary School

  600 m away
• St Paul's Church of England Primary School

  800 m away

• The UCL Academy

  600 m away
• Harris Academy St John's Wood

  1.1 km away
• Haverstock School

  1.2 km away

• Belsize Park

  |

  500 m away
• Swiss Cottage

  |

  500 m away
• Finchley Road

  |

  700 m away

The flood risk here is rated Very Low, based on Environment Agency data.